Okay, so. First off, I'm feeling like a dork (that story comes later)*. Now I'm trying to use the steam-engine calculator, and I had a few quick questions (that are probably also dumb, but I do want to make I've got this before I do my first build today).

So, after being shocked by the results, I figured out that you put your target/max V you'll use into the calculator, not the max V of your battery, correct? (I got something like 800W before I figured that out). And the W the calculator pops out with--that is what would happen with the I/V/R settings (just realized whilst typing this that of course it is... that's how equations work)... which means there's no way to find an actual max wattage without inputting the max voltage of my battery? Yes? (And, clearly, I'm good on that).

So if I wanted less power than comes out of the calculator with the settings (including an estimated voltage), I just use less power, and my fancy smoking calculator (mod) will just end up using a lower voltage?

And the actual point of the calculator/using Ohm's Law is solely to determine if the voltage on your battery is sufficient for your build? That's it, right?

*Promised story (please take into account that I was extremely tired... but feel free to laugh)

So, I'm doing my first build today, after the batteries come for my ohm reader. So, I decided it was time for Ohm's Law (again, though E&M was my most hated class in college, so I think I've blocked it from my mind the best I could).

I pop open my mod to look at the battery. Big numbers: 2250 mah, and then blah, blah, blah. Awesome! That's a big number to be working with. (See the problem yet?)

The calculator runs in amps, no problem, milli => divide by 1000--oh. That's not a big number anymore. But confident in my mod, I proceed, and enter 0.15 ohms, and my amperage, and hit enter. Oh. 0.76W. That seems bad, let's try another... After a few sub ohm calculations, I'm figuring that my mod is the crappiest thing that ever crapped. And wondering where I went wrong.

Morals of the story: 1) mah is milli-amp-HOURS. Duh. As in, how long your battery can last. Voltage is the shining star of the calculation. 2) I am a huge dork.

Rather than an ohms law calculator, I would use use steam-engine to work out the safe amp draw for a resistance or wattage level for a given build/battery.
Your mod uses an internal LiPo battery, this should be ideal for the requirements of your particular mod. If not then by the sound of it may be swappable. If you can provide the exact model of mod, and the specific model and numbers on the battery then we may be able to do some research.

I'm not familiar with that mod or Lipo pack, but the DNA chipset is highly regarded. I wouldn't worry too much, the battery should be suitable and the safety features and regulator chip in the mod should take care of the rest. Vape on.